All race tracks should be required to install the new synthetic surfacing in place of dirt, it eliminates most of the broken legs that happen to so many horses on dirt tracks. After Polytrack was installed at Turfway Park in Florence KY catastrophic horse injuries dropped from an average of over 20 per racing season to 3 per season. It's expensive, but so are thoroughbred horses and they also feel pain.
Had the filly raced on dirt before? I know they mentioned at least one or more of the horses had only raced on synthetic tracks.
That sounds like a very good idea, the synthetic surfacing.